If you set new user account activation to admin, a two step process is required for registration.

• User registers and uses the activation link in the mail he gets to verify.
• Admins get notified via mail and activate the account

If the admins use the link provided in the notification mail to activate the account via the front-end, the user is notified that the account can be used now.

Not so if the activation is done via the back-end.

I'd like to suggest
a) an option to list all registered and verified, but not yet activated users in the back-end
b) execute a bulk-activation including a notification mail to each individual freshly activated user

My apologies if this should be the wrong spot for FRs, I am new to this and trying to be productive while learning on the way.